Eagle Rock Film Productions Limited in association with the Independent Film Channel ; a Bill and Ben Production ; producers, Bill Jones and Ben Timlett ; directors Bill Jones, Alan G. Parker and Ben Timlett
a presentation by the Chemical Heritage Foundation ; director, Glenn Holsten ; producers, Chayne Gregg, Hope Krosskove ; writers, Tracey Thompson, Glenn Holsten ; a FreshFly production
producer, Tara Elwood ; directed by Renny Bartlett, PJ Naworynski, Timothy Wolochatiuk ; produced in association with Canadian Broadcasting Corporation
a Blakeway Production for the BBC and WGBH Boston ; produced by Chris Oxley & Malcolm Neum ; directed by Chis Oxley ; produced for NOVA by Joseph McMaster ; narration written by Joseph McMaster
producer, Tara Elwood ; directed by Renny Bartlett, PJ Naworynski, Timothy Wolochatiuk ; produced in association with Canadian Broadcasting Corporation
director, Glenn Holsten ; producer, Chayne Gregg ; writers, David C. Brock, Glenn Holsten, Arnold Thackray ; a Freshfly production for the Chemical Heritage Foundation